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Page 181 / 198 Scroll up to view Page 176 - 180
Diagnostics and Troubleshooting
181
AC1600 WiFi Cable Modem Router
Perform Diagnostics
The modem router lets you perform various diagnostic tasks. For normal operation, these
tasks are not required.
Ping an IP Address
Use this test to send a ping packet request to an IP address to test the connection. If the
request times out because no reply is received, the destination might be unreachable.
However, some network devices can be configured not to respond to a ping.
To ping an IP address:
1.
Launch an Internet browser from a computer or WiFi device that is connected to the
network.
2.
Type
.
A login window opens.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
The BASIC Home page displays.
5.
Select
ADVANCED > Administration > Diagnostics
.
By default,
Ping
is selected from the
Utility
menu.
6.
Enter the ping settings.
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Diagnostics and Troubleshooting
182
AC1600 WiFi Cable Modem Router
The following table describes the fields for the ping settings on the Diagnostics page.
Field
Description
Target
Enter the IP address of the device that you want to ping.
Ping Size (in bytes)
Enter the size of the ping packet. By default, the packet size is 64 bytes.
No. of Pings
Enter the number of times that the IP address is pinged. By default, the ping is sent
three times.
Ping Interval (in ms)
Enter the interval between the consecutive pings. By default, the interval is 1000 ms.
7.
Click the
Start Test
button.
The Results field displays the results of the ping test.
8.
If the test does not complete, click the
Abort Test
button and try again.
9.
To refresh the results in the Results field, click the
REFRESH
button at the bottom of the
field.
10.
To remove all information from the Results field, click the
Clear Results
button.
Trace a Route
Use this test to trace a route to an IP address or host name to test the connection. If you use
a host name, you can also use this test to resolve the name to an IP address. If the request
times out because no reply is received, the destination might be unreachable. However,
some network devices can be configured not to respond to a traceroute request.
To trace a route:
1.
Launch an Internet browser from a computer or WiFi device that is connected to the
network.
2.
Type
.
A login window opens.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
The BASIC Home page displays.
5.
Select
ADVANCED > Administration > Diagnostics
.
The Diagnostics page displays.
6.
From the
Utility
menu, select
Traceroute
.
Page 183 / 198
Diagnostics and Troubleshooting
183
AC1600 WiFi Cable Modem Router
7.
Enter the traceroute settings.
The following table describes the fields for the traceroute settings on the Diagnostics
page.
Field
Description
Target (IP address or
Name)
Enter the IP address or host name of the device that you want to trace.
Max Hops
Enter the maximum number of hops for the trace. By default, the maximum number
of hops is 30.
Data Size (in bytes)
Enter the size of the probe packet. By default, the probe packet size is 32 bytes.
Base Port
Enter the port from which the probe packet is sent. By default, the port number is
33434.
Resolve Host
If you enter a host name, specify whether the name is resolved to an IP address by
selecting one of the following options from the
Resolve Host
menu:
•
Off
. The name is not resolved to an IP address.
•
On
. The name is resolved to an IP address.
8.
Click the
Start Test
button.
The Results field displays the results of the ping test.
Note:
By default, after 30 hops, a traceroute times out.
9.
To refresh the results in the Results field, click the
REFRESH
button at the bottom of the
field.
10.
To remove all information from the Results field, click the
Clear Results
button.
Page 184 / 198
Diagnostics and Troubleshooting
184
AC1600 WiFi Cable Modem Router
Quick Tips for Troubleshooting
The following table includes tips for troubleshooting some common problems.
Table 5.
Quick tips for troubleshooting
Problem
Possible Solution
Your network is unresponsive
or does not function normally.
Restart your network:
1.
Turn off the modem router.
2.
Turn on the modem router
3.
Wait two minutes.
Your cannot connect over an
Ethernet cable to the modem
router.
•
Make sure that the Ethernet cables are securely plugged in.
•
Make sure that your computer or device does not use a static IP address
but is configured to receive an IP address automatically with DHCP. (For
most devices, DHCP is the default setting.)
You cannot connect over WiFi
to the modem router.
•
Make sure that the WiFi settings in your WiFi device and modem router
match exactly.
•
Make sure that your WiFi device supports the security that you are using
for your WiFi network (WEP, WPA, or WPA2). For information about WiFi
security settings, see
Manage the Basic WiFi Settings and WiFi Security of
the Main Network
on page
36.
•
Make sure that the modem router is not too far from your WiFi device or too
close:
-
Move your WiFi device near the modem router but at least 6 feet
(1.8
meters) away and see if the signal strength improves.
-
Make sure that the WiFi signal is not blocked by objects between the
modem router and your WiFi device.
•
Make sure that the WiFi LED for the 2.4 GHz radio or 5 GHz radio that you
want to connect to is not off.
•
Make sure that the modem router’s SSID broadcast is not disabled.
•
Make sure that your WiFi device does not use a static IP address but is
configured to receive an IP address automatically with DHCP. (For most
devices, DHCP is the default setting.)
For a device that is connected over WiFi, the WiFi network name (SSID)
and WiFi security settings of the modem router and WiFi computer must
match exactly. The default SSID and password are on the product label (see
Product Label
on page
23).
If WiFi LED for a radio is off, the WiFi radio might be disabled. For more
information about the WiFi radios, see
Control the WiFi Radios
on
page
155.
If the modem router’s SSID broadcast is disabled, the WiFi network name is
hidden and does not display in your WiFi device’s scanning list. To connect
to a hidden network, you must enter the network name and the WiFi
password. For more information about the SSID broadcast, see
Manage the
Basic WiFi Settings and WiFi Security of the Main Network
on page
36.
Page 185 / 198
Diagnostics and Troubleshooting
185
AC1600 WiFi Cable Modem Router
Troubleshoot with the LEDs
When you turn on the power, the LEDs light as described here:
1.
When power is first applied, the Power LED
lights red for a second and then turns
green.
2.
After about 15 seconds, the Downstream LED
, Upstream LED
, and Internet
LED
start blinking green.
3.
After about 35 seconds, the 2.4 GHz LED
lights green.
4.
After about 45 seconds, the 5 GHz LED
lights green.
5.
When the modem router establishes external connections, the following occurs:
•
After the modem router establishes a downstream connection, the Downstream
LED
lights solid amber or solid green.
•
After the modem router establishes an upstream connection, the Upstream LED
lights solid amber or solid green.
•
After the modem router establishes an Internet connection, the Internet LED
lights solid green. At this point, the modem router is ready for use.
Note:
Whether the Ethernet LED
lights depends on whether an Ethernet
device is connected to the modem router.
Power LED Is Off
If the Power LED
and other LEDs are off when your modem router is turned on, do the
following:
•
Check that the power cord is correctly connected to your modem router and that the
power supply adapter is correctly connected to a functioning power outlet.
•
Check that you are using the 12 VDC 2.5A power adapter that NETGEAR supplied for
this product.
If the error persists, a hardware problem might exist. For recovery instructions or help with a
hardware problem, contact technical support at
netgear.com/support
.
Power LED Is Red
When the modem router is turned on, the Power LED
lights red for one second and then
turns green. If the Power LED does not turn green, a fault exists within the modem router. In
this situation, turn the power off and on to see if the modem router recovers. If the Power LED
still does not turn green, do the following:
•
Turn the power off and on one more time to see if the modem router recovers.
•
Clear the modem router’s configuration to factory defaults (see
Return the Modem Router
to Its Factory Default Settings
on page
113). This sets the modem router’s IP address to
192.168.0.1.

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